paid workers, doing real work for no pay. they're supposed to be learning. and the employer can't derive immediate benefit from the interns activities. >> the financial stress was really difficult. >> reporter: working on the "charlie rose" show, the summer before senior year at wesleyan, was lucy bickerton's third unpaid internship. >> in some ways i was sort of the best case scenario of an unpaid internship-- i actually got a paid opportunity out of it, you know, a year later, after i graduated. but then going on to get paid for that same work, i realized, "why wasn't i getting paid for this before?" >> reporter: how many hours a day were you working? >> oh, normal full-time job. eight, ten hours, depending on the day, 12. >> reporter: eric glatt was 40 years old, had an m.b.a. and years of experience, when unable to find any paying jobs in film, he took an internship on fox searchlight's "black swan." the 2010 film went on to earn $300 million.